To access all API RPC schemas which define the format of XML documents for API RPC packets content, download the archive
schemas.zip from http://download1.parallels.com/Plesk/PPP9/Doc/schemas.zip.
The <path-to-archive>/rpc directory contains a separate folder with a set of API RPC schemas for each protocol version supported by Plesk.
For viewing API RPC schemas related to a specific operator, refer to the XML Schemas for API RPC Operators chapter. This chapter provides a list of supported operators and links to the corresponding schemas for each API RPC version.